Heat-resisting article



April 20 {1926.

J. C. HENDERSON HEAT RESISTING ARTICLE Filed April 9,

1925 2 'Sheets$heet 1 c INVENTOR W ATTORNEY 1,581,443 J. C. HENDERSON HE'A'I RESISTI'NG ARTICLE Filed April 9, 1925 2 s-Sheet 2 April 20,1926.

NVENTOR W A'ITORNEY Patented Apr. 20, 1926.

UNITED STATES JOHN CLIFTON HENDERSON, OF NEW YORK, N. Y., ASSIGNOR TO DRIVER-HARRIS COMPANY, OF HARRISON, NEW JERSEY, CORPORATION OF NEW JERSEY.

HEAT-RESISTING ARTICLE. v

To all whom it mwycomem:

Be it knownthat I, JOHN G. Hnmmnsou, a citizen of the United States, residing at New York, county of New York, State of New York, haveinvented a certain new and useful Improvement in Heat-Resisting Articles, of which the following is a full, clear,

and exact description.

Y My invention relates to heat reslstin a1- ticles which'when in use are subjected rom time to time to high external temperatures and has for its objectto provide means for reenforcing such articles so as to enable them to withstand to a higher degree the strains jected these articles, more particularly when they have thickened rims or other pro j'ections, or angles, sometimes fail by crack- .ing, thereby reducing their life to a .very

considerable degree. Where there is a rim or projection joining the bod of the articlethe. cracking i most liab e to occur at the joint. Furthermore, it is known that in casting such articles there is sometimes formed during the casting process what are known as draws, the same being slight cracks due to the shrinking of the metal, which cracks during the repeated beatings and coolings are apt to grow so as to cause the article to give way. In order-to avoid these difliculties I have reenforced such articles at points Where these defects are likely to develop by a.v wrought rod of approximately similar material embedded in and connected to the cast material by local welds.

' chromium and Thus'if the body of the article is made of a heat resisting nickel-chromium-iron alloy,-

the reenforcingrod is also made of a heat resisting" nickel-iron-chromium alloy. If made of chrome-iron or silicon-iron the reenforcing rods are made of chrome or silicon iron respectively. I preferably make the= body of the articles of "a nickel-chromium iron alloy havin iron and make the wrought reenforcing member of the mateabout nickel, 12%

Application tiled April 9, 1925. Serial No..21,749.

rial having substantially the same composition.

The following is a description of an embodiment of my invention, reference being bald hto the accompanying drawings, in w 10 Fig. 1 is a plan view of a box. embody inggny invention;

1g. 2 is a section of the same on the line 2-2, Fig. ,3; 7

Fig. 3 is a vertical section; I t Figs. 4 and 5 are enlarged sectional de Fig. 6 shows a horizontal section of a modification on the line 66, Fig. 7; I F ig. 7 shows a vertical section on the line 77, Fig. 6;

Fig. 8 shows an enlarged sectional 'detail on the line 8-8, Fig. 7;

Fig. 9 is a' modified embodiment of my invention comprising a' circular box and cover;

Fig. 10 is a. section on the line 10-10, F1%. 9-; and-- v ig. 11 is a section of line 11-11, Fig. 9. Referring more particularly to the drawmgs, 2 is the cast body portion of a rectangular carburizing box or mouthed container made of a heat resistin alloy and having at its upper end a pro ecting rim or bead 4'and at its lower end supporting feet 6. Embedded in the cast bodyof the box at its upper rim is a rod. 8 ofwrought -mat erial of similar composition to that com poslng the body of the box, while embedded in bottom ortlons of the box and extending into the eet are short wrought rod sections 10 of similar material.

The reenforcing member 8 in the rim extends around the mouth of the box but is preferably interrupted at two diametrical points so as to form two sections, each sectionhaving portions 1 ing upon three sides of the box, as shown. he reenforcin nection with a rectangular box it is diflicult to make a rod made of one section lie in a given plane so within the rim. 7

When the box is relatively tall I also embed in the central portion of the side wall aflat strip of approximately fsimilar member 8 is made in two sections, since in con-- as to be properly located the cover on the wrought material connected to the cast mass by a weld. This may be a strip of wire mesh as shown at 12.

Figs. 6, 7 and 8 show a rectangular box made of heat resisting alloy having at each of its corners a wrought angular plate 14 plate 14 of similar alloy, preferably perforated, which is embedded in the cast mass 16 and Welded to the same reenforcing the corner portions. V

In Figs. 9, 10 and 11 a round box is shown having a wrought hoop-like reenforcing member 18 of heat resisting alloy similar to the cast body portion 20 of the box, and wrought reenforcing members 22 in the feet. In this case the circular reenforcing member 18 is preferably made in the form of a closed loop, as shown.

The wrought members are in each 1 nstance welded to the cast mass. The rim rods for boxes having half inch walls and three-quarters of an inch thick at the rims the body of the cover and has its surface inch thick and the other reenforcing members of similar relative thickness.

Figs. 9 and" 11 show a box cover 24 havin a handle 26, the cover and outer portion 0 the. handle being cast integral and of heat resisting alloy, and the handle having embedded therein a wrought rod 28 of substantially similar alloy which also extends into welded to the'adj acent cast portions of cover and handle.

In producing the articles above referred to, the reenforcing members are placed n the molds, being supported improper positions' by chaplets of similar material, and the alloy for the body of the article is then heated to a point sufliciently high fuse the surface of the wroughtmembers shghtly when poured about them so as to form a weld between the surface of the wrought member of the cast body portion, thus establishing an intimate-connection between the two.

The flat strip of Fig. 3 is provided with holes and when sheet metal portions as in Figs. 6, 7 and 8 are employed, I preferably perforate them so as to form clinch holes,

thus forming a still more intimate connection between the reenforcing members and the cast body of the mass.

The wrought members of the character re- .ferred to are usually produced by rolling or drawing and when so produced have a higher tensile strength than castings of the same alloy and a greater elasticity. In all cases the wrought portions are cleaned so that the scale and dirt are removed so that they are in condition to make a good weld.

Where the nickeLchrQmium-iron alloy, particularly above referred to, is used, the pour ng temperature of that allo is a proximately 2900 degress Fahrenheit, and in carrying out my, invention I heat the portion of the alloy to be cast to substantially 2900 bers and results in forming a weld between the cast portion and the surface of the wrought rod. The. presence of the wrought members in the mold results in producin what is known as a chill in the cast meta; surrounding them. These chilled? portions are of finer texture and greater tensile strength than the unchilled cast portions so that the reenforcing members strengthenthe article not only on account of their own characteristics but also on account of their action on the metal being cast. reen'forcing internal chills at the points of strain coacting with the reenforcing' members.

As will be evident to those skilled in the art, my invention permits of various modifications without departing from the spiritthereof or the scope of the appended claims.

What I claim is:

1. A container subjected when in useto high external temperatures, having a body portion comprising a cast mass of high heat resisting alloy and a wrought reenforcing and strain resisting member of similar alloy embedded in said mass, there being 'a wild between said cast mass and said wrought member, the exterior wall of said container having an angle and said wrought member 'being angular and extending around said angle within said wall.

2. An article subjected, when in use to high external temperatures constituting a mouthed container having a body portion comprising a cast mass of high heat resisting alloy and a wrought reenforcing and strain resisting member of similar alloy embedded in said mass adjacent to the mouth of said container and extending continuousl along more than one sidethereof, there being a weld between said cast mast and said wrought member.

3. An article subjected when in use to high external temperatures, constituting a mouthed container having a body portion comprising a cast mass of high heat resisting alloy and a. wroughtreenforcing and strain resisting member of similar alloy embedded in said mass adjacent to the mouth of said container, there being a weld between said cast mass and said wrought member, the mouth of said container being rectangular and said member being divided into two parts, each part having portions on three sides of said ,mouth.

4. A container subjected when in use'to high external temperatures having an outwardly projecting flange adjacent to its mouth and entirely surrounding the same The articles have forming a thickened portion, said container comprising a cast mass of high heat resisting alloy and having a wrought reenforcing and strain resisting member of similar alloy em bedded in said thickened portion, there being a weld between said cast mass and said wrought member, the mouth of said container having an angle and said wrought member being angular and extending around said angle.

In testimony whereof, I have signed my name to this specification this 26th day of March, 1925.

JOHN CLIFTON HENDERSON. 

